package com.zhang.springcloud.controller;



import com.zhang.springcloud.entities.CommonResult;
import com.zhang.springcloud.entities.Payment;
import com.zhang.springcloud.lb.LoadBalance;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
      //单机版的可以写死，集群版的要写服务名称
      //public static final String PAYMENT_URL = "http://localhost:8001";
      //Ribbon和Eureka整合后Consumer可以直接调用服务而不用再关心地址和端口号，且该服务还有负载功能了
      public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    LoadBalance loadBalance;

    @Resource
    DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);

    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
           log.info(entity.getStatusCode()+"\t"+entity.getBody());
           return entity.getBody();
        }else{
            return new CommonResult<>(444,"操作失败");
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
     List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

     if(instances == null || instances.size() <= 0){
         return null;
     }
     ServiceInstance serviceInstance = loadBalance.instances(instances);
     URI uri = serviceInstance.getUri();

     return restTemplate.getForObject(uri+"/payment/lb" ,String.class);
    }

    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin(){
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/",String.class);
        return result;
    }

}
